View source for Guide:Calculating Poison Damage v1.10, by onderduiker

==Lower Resist==
A target's Poison Resist (PR) % reduces poison's rate, and PR 100+% makes a monster Immune to Poison (players and hirelings are capped at PR 95%). [[Lower Resist]] (LR) applies PR -%, although it's applied at 1/5 effectiveness against Immune to Poison monsters: level 10 LR's PR -55% is reduced to PR -11% (55/5). PR -100% is the absolute minimum to which a target can be reduced, doubling the rate.


25,022-26,317 bit rate for 350 frames results in 34,209-35,980 poison damage being applied over 14 seconds to a target with PR 0%. PR 50% would halve the rate, but casting level 10 LR (PR -55%) results in the following:


{|style=text-align:left
|
{|
|-valign=top
!rowspan=3|Min bit rate
|= 25,022*(100-(50-55))/100
|-
|= 25,022*1.05
|-
|= 26,273
|-valign=top
!rowspan=2|Min damage
|= 26,273*350/256
|-
|= 35,920
|}
|
{|
|-valign=top
!rowspan=3|Max bit rate 
|= 26,317*(100-(50-55))/100
|-
|= 26,317*1.05
|-
|= 27,632
|-valign=top
!rowspan=2|Max damage
|= 27,632*350/256
|-
|= 37,778
|}
|}


Thus 35,920-37,778 poison damage is applied over 14 (350/25) seconds. LR is applied when the target is poisoned, so it can be overwritten by another curse immediately afterwards. Even if LR is required to break immunity, once poison has been applied its rate and length remain unchanged, even if the monster becomes Immune to Poison again.
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